Mask



FIG. 1 is a top and side perspective view of a mask showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a right side elevational view thereof;

FIG. 8 is a top and side perspective view of a second embodiment of the mask; and,

FIG. 9 is a top and rear perspective view of FIG. 8.

The bottom of the second embodiment being the same as the first embodiment shown in FIG. 3. 

The ornamental design for a mask, as shown and described. 